Installation keeps failing on RPi B+ with Raspbian

[wouterds]

pi@raspberrypi3 /var/www/dslr-control$ npm install piglow --save                                                                                                                 
npm WARN package.json DSLRCamControl@1.0.0 No description
npm WARN package.json DSLRCamControl@1.0.0 No repository field.
npm WARN package.json DSLRCamControl@1.0.0 No README data
/
> i2c@0.1.8 install /var/www/dslr-control/node_modules/piglow/node_modules/i2c
> node-gyp rebuild

child_process: customFds option is deprecated, use stdio instead.
make: Entering directory '/var/www/dslr-control/node_modules/piglow/node_modules/i2c/build'
  CXX(target) Release/obj.target/i2c/src/i2c.o
make: g++: Command not found
i2c.target.mk:81: recipe for target 'Release/obj.target/i2c/src/i2c.o' failed
make: *** [Release/obj.target/i2c/src/i2c.o] Error 127
make: Leaving directory '/var/www/dslr-control/node_modules/piglow/node_modules/i2c/build'
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:267:23)
gyp ERR! stack     at ChildProcess.emit (events.js:110:17)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:1067:12)
gyp ERR! System Linux 3.12-1-rpi
gyp ERR! command "node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /var/www/dslr-control/node_modules/piglow/node_modules/i2c
gyp ERR! node -v v0.12.0
gyp ERR! node-gyp -v v1.0.2
gyp ERR! not ok 
npm ERR! Linux 3.12-1-rpi
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "piglow" "--save"
npm ERR! node v0.12.0
npm ERR! npm  v2.5.1
npm ERR! code ELIFECYCLE

npm ERR! i2c@0.1.8 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the i2c@0.1.8 install script 'node-gyp rebuild'.
npm ERR! This is most likely a problem with the i2c package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get their info via:
npm ERR!     npm owner ls i2c
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /var/www/dslr-control/npm-debug.log

Full npm-debug.log: http://cl.ly/ZsSg/direct

[wouterds]

Sorry nvm, I was missing g++.

[seriousManual]

np, hope you like it!